Re: [LTP] Unifying syscalls tests for EFAULT

[chrubis@suse.cz]

Hi!
> > * Is there a machine that has userspace address mapped on NULL ?
> 
> I do recall a testcase, which had special setup for ia64, because
> it didn't work as expected for NULL. When looking at process map,
> there was a single page mapped 0, which didn't come from test:
> 
> # cat /proc/self/maps
> 00000000-00004000 r--p 00000000 00:00 0
> 
> See this email thread:
>   https://www.mail-archive.com/ltp-list@lists.sourceforge.net/msg17855.html

Hmm, so I guess that only portable way to cause EFAULT would be mapping
PROT_NONE page.

-- 
Cyril Hrubis
chrubis@suse.cz

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